EXHIBIT 32.2



                                CERTIFICATION OF
                             CHIEF FINANCIAL OFFICER
                      OF PIONEER NATURAL RESOURCES COMPANY
                         PURSUANT TO 18 U.S.C. ss. 1350


         I, Timothy  L.  Dove,  Executive Vice  President  and  Chief  Financial
Officer of Pioneer Natural  Resources  Company (the  "Company"),  hereby certify
that the  accompanying  report  on Form  10-Q  for the  quarterly  period  ended
September 30, 2003 and filed with the Securities and Exchange  Commission on the
date hereof  pursuant to Section  15(d) of the  Securities  Exchange Act of 1934
(the  "Report") by the Company  fully  complies  with the  requirements  of that
section.

I further certify that the information  contained in the Report fairly presents,
in all material  aspects,  the financial  condition and results of operations of
the Company.




                                            /s/ Timothy L. Dove
                                        --------------------------------
                             Name:   Timothy L. Dove, Executive Vice
                                        President and Chief Financial Officer
                             Date:   October 31, 2003